JP2014112133A - Transparent resin composition, color filter and liquid crystal display unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reliable liquid crystal display unit capable of avoiding a screen thereof from burning even with a screen display for an extended period of time, and to provide an overcoat layer material for removing residual electric charge of a color filter layer possibly serving as a cause of burning.SOLUTION: A transparent resin composition is used for an overcoat layer formed on coloring pixels of a color filter for a liquid crystal display unit. The transparent resin composition includes at least one kind of metal fine particles and metal wire-like fine particles or one of polymerization inhibitor, antioxidant and quaternary amine salt. The coating film has a thickness of 2.0 μm, and resistivity when turned to a cured film is 1.0×10-1.0×10Ω-cm.

Description

  The present invention relates to a transparent resin composition for an overcoat layer which is formed on a colored pixel of a color filter for a liquid crystal display device and can remove residual charges.

  In recent years, liquid crystal display devices using TFTs (Thin Film Transistors) have become mainstream as display devices. Since the liquid crystal display device is thin and light, it is widely used from a large size like a television receiver to a small size like a mobile phone display. Liquid crystal display devices used for mobile phones have been required to have higher resolutions as mobile phones become more sophisticated. The color filter is also required to have high resolution in accordance with the demand.

  Generally, for colorization of a liquid crystal display device, a black matrix (BM) is provided on the glass substrate facing the glass substrate on which the TFT is formed or on the TFT, and red, blue, Colored pixels of the three primary colors of green are formed. A transparent resin layer may be provided on the formed colored pixel as a planarizing layer (overcoat, hereinafter referred to as overcoat). Further, a transparent electrode is laminated as a liquid crystal driving electrode. ITO (indium doped tin oxide) is generally used for the transparent electrode from the viewpoint of transparency, low resistivity, and the like.

  In recent years, the IPS mode (In Plane Switching Mode) and the FFS mode (Fringe) have advantages such as viewing characteristics such as viewing angle characteristics and high contrast, and resistance to pressing pressure with a finger or an input pen in a liquid crystal equipped with a touch panel, which is rapidly increasing. An electrode such as a field switching mode is formed only on the TFT substrate side, and a method in which a liquid crystal rotates on a plane parallel to the TFT substrate, a so-called lateral electric field method, has been widely used.

  For example, Patent Document 1, Patent Document 2, and Patent Document 3 disclose lateral electric field type liquid crystal display devices. An FFS mode liquid crystal display panel is described in, for example, Patent Document 4.

In the IPS mode and the FFS mode, an electrode substrate is not necessary for a substrate (hereinafter referred to as a color filter) on which a colored layer on the opposite side of the TFT substrate is formed. In these modes, when an electric field is applied, polarization occurs in the color filter, and after the application of the electric field, the polarized state is maintained, thereby generating a residual DC voltage (hereinafter referred to as residual DC). When the residual DC is a predetermined value or more, there is a problem that the orientation of the liquid crystal molecules is affected and the screen is burned (hereinafter, sometimes referred to as an afterimage). In response to this problem, Patent Document 5 discloses that the occurrence of polarization is suppressed by setting the resistivity of the overcoat layer to 1.0 × 10 ¹³ or more, and the residual DC is set to a predetermined value or less.

  On the other hand, however, it has been pointed out that when the color filter layer has a high resistivity, the liquid crystal display device is burned by being charged with static electricity (Patent Documents 6 and 7).

In particular, a liquid crystal display device equipped with a touch panel in recent years is likely to be charged with static electricity because the finger touches the liquid crystal display device. In Patent Document 2, conductivity is imparted by creating a very thin transparent electrode layer between the overcoat layer and the colored layer or adding fine particles such as indium-doped tin oxide (ITO) to the overcoat layer. Has been proposed to make the resistivity of 1.0 × 10 ^{8 to} 1.0 × 10 ¹² . In Patent Document 7, conductivity is imparted by adding 30 to 60 mass% of antimony oxide, carbon nanotube, phosphorus-doped tin oxide, fluorine-doped indium oxide, and titanium oxide-tin oxide composite oxide fine particles to the overcoat layer. It has been proposed that the resistivity be 1.0 × 10 ^{8 to} 1.0 × 10 ¹¹ .

However, if the resistivity is lowered to 1.0 × 10 ^{8 to} 1.0 × 10 ^{11, the} problem presented in Patent Document 1 occurs. Furthermore, if fine particles are added in an amount exceeding 30%, the thixotropy of the transparent resin film is affected. If the thixotropy changes, the transparent resin film will follow the steps of the colored pixels when applied on the colored pixels, so it will not be able to play another role of providing flatness of the overcoat layer, and the alignment film Application failure and alignment failure of liquid crystal occur.

JP 7-128683 A JP-A-7-159786 JP-A-8-220518 JP 2008-64954 A JP 2010-243658 A Japanese Patent Laid-Open No. 9-313124 No. 4467934

  SUMMARY OF THE INVENTION In view of the above circumstances, the present invention provides a highly reliable liquid crystal display device in which a screen does not burn even when a screen is displayed for a long time, and for removing residual charges in a color filter layer that causes burn-in. The object is to provide an overcoat layer material.

As means for solving the above problems, the invention described in claim 1 is a transparent resin composition used for an overcoat layer formed on a colored pixel of a color filter for a liquid crystal display device,
The transparent resin composition comprises at least one kind of metal fine particles, metal wire fine particles,
Or a polymerization inhibitor, an antioxidant, or a quaternary amine salt,
A transparent resin composition having a coating film thickness of 2.0 μm and a resistivity of 1.0 × 10 ¹⁰ Ω · cm to 1.0 × 10 ¹³ Ω · cm when a cured film is formed. is there.

  The invention described in claim 2 is characterized in that the transparent resin composition is a mixture of an acrylic resin and an epoxy resin, and the acid value of the acrylic resin is 150 to 400. The transparent resin composition.

The invention according to claim 3 is a transparent resin composition used for an overcoat layer formed on a colored pixel of a color filter for a liquid crystal display device,
The transparent resin composition is a mixture of an acrylic resin and an epoxy resin, and the acid value of the acrylic resin is 150 to 400,
A transparent resin composition having a coating film thickness of 2.0 μm and a resistivity of 1.0 × 10 ¹⁰ Ω · cm to 1.0 × 10 ¹³ Ω · cm when a cured film is formed. is there.

  The invention according to claim 4 is the transparent resin composition according to any one of claims 1 to 3, wherein the metal is silver.

The invention according to claim 5 is a color filter characterized in that the transparent resin composition according to any one of claims 1 to 4 is formed on a colored pixel as an overcoat layer.

  According to a sixth aspect of the present invention, there is provided a liquid crystal display device comprising the color filter according to the fifth aspect.

  According to the present invention, since the overcoat layer has an appropriate conductivity, it is possible to provide a color filter that removes residual charges that are generated and accumulated when the liquid crystal display device is driven and has excellent flatness. Furthermore, it can be used as a color filter for obtaining a highly reliable liquid crystal display device in which the screen does not burn even when the screen is displayed for a long time.

It is the conceptual diagram which showed the cross-sectional shape of the color filter concerning this invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings.

<Colored layer>
The color filter for a liquid crystal display device used in the present invention has at least red, green, and blue colored pixels. If necessary, it has pixels of other colors (for example, cyan, magenta, and yellow which are complementary colors). The coloring material used for these pixels is not particularly limited, and known pigments or dyes can be used. The mass concentration of the coloring material in the color filter is preferably 0.1% to 50%, more preferably 1% to 45%, and still more preferably 10% to 40%.

  If it is less than 0.1%, the pigment concentration is low, and in order to form colored pixels of sufficient color as a color filter, it is difficult to form the pixels because the thickness of the colored pixels must be very large. There is a practical difficulty because productivity deteriorates, and if it exceeds 50%, the amount of resin for dispersing pigments and dyes becomes less and becomes unstable, and viscosity increases due to aggregation of pigments and dyes. It causes a decrease in contrast (light scattering by coarse particles).

  Known pigments include, for example, red pigments, C.I. I. Pigment Red 7, 9, 14, 41, 48: 1, 48: 2, 48: 3, 48: 4, 81: 1, 81: 2, 81: 3, 97, 122, 123, 146, 149, 168, 177 178, 179, 180, 184, 185, 187, 192, 200, 202, 208, 210, 215, 216, 217, 220, 223, 224, 226, 227, 228, 240, 242, 246, 254, 255 264, 272, 279 and the like. I. Pigment Red 177, 242, and 254 are preferably used.

  Examples of orange pigments include C.I. I. Pigment Orange 36, 43, 51, 55, 59, 61, 71, 73 and the like. I. Pigment Orange 36 is preferably used.

  Examples of yellow pigments include C.I. I. Pigment Yellow 1, 2, 3, 4, 5, 6, 10, 12, 13, 14, 15, 16, 17, 18, 20, 24, 31, 32, 34, 35, 35: 1, 36, 36: 1 37, 37: 1, 40, 42, 43, 53, 55, 60, 61, 62, 63, 65, 73, 74, 77, 81, 83, 86, 93, 94, 95, 97, 98, 100 , 101, 104, 106, 108, 109, 110, 113, 114, 115, 116, 117, 118, 119, 120, 123, 125, 126, 127, 128, 129, 137, 138, 139, 144, 146 147, 148, 150, 151, 152, 153, 154, 155, 156, 161, 162, 164, 166, 167, 168, 169, 170, 171, 172, 1 3,174,175,176,177,179,180,181,182,185,187,188,193,194,199,213,214 and the like, but, in particular C. I. Pigment Yellow 138, 139, 150 is preferably used.

  Examples of the green pigment include C.I. I. Pigment Green 7, 10, 36, 37, 58 and the like can be used. I. Pigment Green 7, 36, and 58 are preferably used.

  Examples of blue pigments include C.I. I. Pigment Blue 1, 15, 15: 1, 15: 2, 15: 3, 15: 4, 15: 6, 16, 22, 60, 64, 80, and the like. I. Pigment Blue 1, 15: 4, 15: 6 can be used.

  Further, as a purple pigment, C.I. I. Pigment Violet 1, 19, 23, 27, 29, 30, 32, 37, 40, 42, 50, etc. are used. I. Pigment Violet 23 is preferably used.

  Inorganic pigments include yellow lead, zinc yellow, red bean (red iron (III) oxide), cadmium red, ultramarine blue, bitumen, chromium oxide green, cobalt green and other metal oxide powders, metal sulfide powders, metal powders Etc. Inorganic pigments are used in combination with organic pigments in order to ensure good coatability, sensitivity, developability and the like while maintaining a balance between saturation and lightness.

  The pigments described so far are preferably finely processed in order to realize high transmittance of the color filter, and preferably have a small primary particle diameter. The primary particle diameter of the pigment was calculated by taking the pigment with a transmission electron microscope and analyzing the image of the photograph. The primary particle diameter referred to here represents a particle diameter (equivalent circle diameter) corresponding to 50% of the total amount in the cumulative curve of the number particle size distribution.

  The primary particle diameter of the pigment is preferably 150 nm or less, more preferably 100 nm or less, and still more preferably 40 nm or less. Moreover, it is preferable that a primary particle diameter is 5 nm or more.

  When the primary particle diameter of the pigment is larger than the upper limit value, the transmittance decreases due to light scattering by the pigment. Moreover, when smaller than a lower limit, pigment dispersion | distribution becomes difficult, it becomes difficult to maintain stability as a coloring composition and to ensure fluidity | liquidity. As a result, the luminance and color characteristics of the color filter are deteriorated.

  As a means for controlling the primary particle diameter of the pigment, a method of controlling the primary particle diameter by mechanically pulverizing the pigment (referred to as a grinding method), a solution dissolved in a good solvent is introduced into a poor solvent, and the desired primary particle diameter is controlled. There are a method for precipitating a pigment having a particle size (referred to as a precipitation method) and a method for producing a pigment having a desired primary particle size at the time of synthesis (referred to as a synthetic precipitation method). Depending on the synthesis method and chemical properties of the pigment to be used, an appropriate method can be selected for each pigment.

  Each method will be described below, but any of the above methods may be used as a method for controlling the primary particle size of the pigment contained in the colored composition used in the present invention.

In the grinding method, the pigment is mechanically kneaded with a grinding agent such as a water-soluble inorganic salt such as salt and a water-soluble organic solvent that does not dissolve the pigment using a ball mill, sand mill or kneader (
Hereinafter, this treatment is referred to as salt milling), and then the inorganic salt and the organic solvent are washed away with water and dried to obtain a pigment having a desired primary particle size. However, since the pigment may crystallize by the salt milling treatment, a method of preventing crystal growth by adding a solid resin or a pigment dispersant that is at least partially dissolved in the organic solvent during the treatment is effective.

  As for the ratio of the pigment to the inorganic salt, if the ratio of the inorganic salt is increased, the efficiency of refining the pigment is improved, but the productivity is lowered because the amount of pigment processed is reduced. In general, 1 to 30 parts by weight, preferably 2 to 20 parts by weight of the inorganic salt is used per 1 part by weight of the pigment. The water-soluble organic solvent is added so that the pigment and the inorganic salt are uniformly solidified. Although depending on the blending ratio of the pigment and the inorganic salt, the water-soluble organic solvent is usually added in an amount of 0.1% by weight with respect to 1 part by weight of the pigment. Used in an amount of 5 to 30 parts by weight.

  More specifically, with respect to the above grinding method, a small amount of a water-soluble organic solvent is added as a wetting agent to a mixture of a pigment and a water-soluble inorganic salt, and after kneading with a kneader or the like, the mixture is poured into water. Stir with a speed mixer to make a slurry. Next, this slurry is filtered, washed with water, and dried to obtain a pigment having a desired primary particle size.

  The precipitation method is a method in which a pigment is dissolved in an appropriate good solvent and then mixed with a poor solvent to precipitate a pigment having a desired primary particle size. The primary method depends on the type and amount of the solvent, the precipitation temperature, the precipitation rate, etc. The particle size can be controlled. In general, pigments are difficult to dissolve in solvents, so the solvents that can be used are limited, but examples include strongly acidic solvents such as concentrated sulfuric acid, polyphosphoric acid, chlorosulfonic acid, or basic solvents such as liquid ammonia, dimethylformamide solution of sodium methylate, etc. It has been known.

  A typical example of this method is an acid pasting method in which a solution in which a pigment is dissolved in an acidic solvent is poured into another solvent and reprecipitated to obtain fine particles. Industrially, a method of injecting a sulfuric acid solution into water is generally used from the viewpoint of cost. The sulfuric acid concentration is not particularly limited, but is preferably 95 to 100% by weight. The amount of sulfuric acid used with respect to the pigment is not particularly limited. However, if the amount is too small, the solution viscosity is high and handling becomes bad. Conversely, if the amount is too large, the treatment efficiency of the pigment is lowered. It is preferable.

  The pigment need not be completely dissolved. The temperature at the time of dissolution is preferably from 0 to 50 ° C. Below this temperature, sulfuric acid may freeze and the solubility will be low. If the temperature is too high, side reactions tend to occur. The temperature of the water to be injected is preferably 1 to 60 ° C., and if the injection is started at a temperature higher than this temperature, it boils with the heat of dissolution of sulfuric acid, and the operation is dangerous. It will freeze at temperatures below this. The injection time is preferably 0.1 to 30 minutes with respect to 1 part of the pigment. As the time increases, the primary particle size tends to increase.

  The primary particle size of the pigment can be controlled while considering the fine particle size of the pigment by selecting a method that combines a precipitation method such as the acid pasting method and a grinding method such as the salt milling method. At this time, it is more preferable because the fluidity as a dispersion can be secured.

  At the time of salt milling or acid pasting, in order to prevent aggregation of the pigment accompanying the control of the primary particle size, the following dispersion aids such as a dye derivative, a resin-type pigment dispersant, and a surfactant can be used in combination. Further, by controlling the primary particle size in the form of coexistence of two or more kinds of pigments, even a pigment that is difficult to disperse alone can be finished as a stable dispersion.

There is a leuco method as a special precipitation method. When a vat dye, such as a flavantron, perinone, perylene, or indanthrone, is reduced with alkaline hydrosulfite, the quinone group becomes a hydroquinone sodium salt (leuco compound) and becomes water-soluble. A pigment having a small primary particle size insoluble in water can be precipitated by adding an appropriate oxidizing agent to the aqueous solution for oxidation.

  The synthetic precipitation method is a method of synthesizing a pigment and simultaneously depositing a pigment having a desired primary particle size. However, when the produced fine pigment is taken out of the solvent, if the pigment particles are not aggregated into large secondary particles, filtration, which is a general separation method, becomes difficult. It is applied to azo pigments synthesized in water.

  Furthermore, as a means for controlling the primary particle diameter of the pigment, the primary particle diameter of the pigment is reduced and dispersed simultaneously by dispersing the pigment for a long time with a high-speed sand mill or the like (so-called dry milling method in which the pigment is dry-pulverized). It is also possible.

  The dye is not particularly limited, and a dye soluble in a known organic solvent can be used. Examples of the known dyes include, for example, JP-A-64-90403, JP-A-64-91102, JP-A-1-94301, JP-A-6-11614, JP-T-2592207, US Patent No. 4,808,501, U.S. Pat.No. 5,667,920, U.S. Pat.No. 5,059,500, JP-A-5-333207, JP-A-6-35183, JP-A-6-51115, Examples thereof include dyes described in JP-A-6-194828.

  Examples of these dyes include acid dyes, oil-soluble dyes, disperse dyes, reactive dyes, and direct dyes. For example, azo dyes, benzoquinone dyes, naphthoquinone dyes, anthraquinone dyes, cyanine dyes, squarylium dyes, croconium dyes, merocyanine dyes, stilbene dyes, diarylmethane dyes, triarylmethane dyes, fluorans Dyes, spiropyran dyes, phthalocyanine dyes, indigo dyes, fulgide dyes, nickel complex dyes, and azulene dyes. Specifically, in addition to the dyes exemplified so far, the following are listed as color index numbers. C. I. AcidGreen 25, 27, C.I. I. Acid Blue 22, 25, 40, 78, 92, 113, 129, 167, 230, C.I. I. Acid Yellow 17, 23, 25, 36, 38, 42, 44, 72, 78, C.I. I. Solvent Yellow 2, 3, 7, 12, 13, 14, 16, 18, 19, 21, 25, 25: 1, 27, 28, 29, 30, 33, 34, 36, 42, 43, 44, 47, 56, 62, 72, 73, 77, 79, 81, 82, 83, 83: 1, 88, 89, 90, 93, 94, 96, 98, 104, 107, 114, 116, 117, 124, 130, 131, 133, 135, 141, 143, 145, 146, 157, 160: 1, 161, 162, 163, 167, 169, 172, 174, 175, 176, 179, 180, 181, 182, 183, 184, 185, 186, 187, 189, 190, 191, C.I. I. Solvent Blue 2, 3, 4, 5, 7, 18, 25, 26, 35, 36, 37, 38, 43, 44, 45, 48, 51, 58, 59, 59: 1, 63, 64, 67, 68, 69, 70, 78, 79, 83, 94, 97, 98, 100, 101, 102, 104, 105, 111, 112, 122, 124, 128, 129, 132, 136, 137, 138, 139, 143, C. I. Solvent Green 1, 3, 4, 5, 7, 28, 29, 32, 33, 34, 35, C.I. I. BasicGreen 3, 4, C.I. I. BasicBlue 3, 7, 9, 17, 41, 66, C.I. I. BasicViolet 1, 3, 18, 39, 66, C.I. I. Basic Yellow 11, 23, 25, 28, 41, C.I. I. DisperseBlue 3, 24, 79, 82, 87, 106, 125, 165, 183, C.I. I. DisperseViolet 1, 6, 12, 26, 27, 28, C.I. I. Disperse Yellow 3, 4, 5, 7, 23, 33, 42, 60, 64, C.I. I. Solvent Orange 1, 2, 3, 4, 5, 7, 11, 14, 20, 23, 25, 31, 40: 1, 41, 45, 54, 56, 58, 60, 62, 63, 70, 75, 77, 80, 81, 86, 99, 102, 103, 105, 106, 107, 108, 109, 110, 111, 112, 113, C.I. I. SolventRed 1, 2, 3, 4, 8, 16, 17, 18, 19, 23, 24, 25, 26, 27, 30, 33, 35, 41, 43, 45, 48, 49, 52, 68, 69, 72, 73, 83: 1, 84: 1, 89, 90, 90: 1, 91, 92, 106, 109, 110, 118, 119, 122, 124, 125, 127, 130, 132, 135, 141, 143, 145, 146, 149, 150, 151, 155, 160, 161, 164, 164: 1, 165, 166, 168, 169, 172, 175, 179, 180, 181, 182, 195, 196, 197, 198, 207, 208, 210, 212, 214, 215, 218, 222, 223, 225, 227, 229, 230, 233, 234, 235, 23 , 238,239,240,241,242,243,244,245,247,248, C. I. SolventViolet 2, 8, 9, 11, 13, 14, 21, 21: 1, 26, 31, 36, 37, 38, 45, 46, 47, 48, 49, 50, 51, 55, 56, 57, 58, 59, 60, 61, C.I. I. Solvent Brown 1, 3, 4, 5, 12, 20, 22, 28, 38, 41, 42, 43, 44, 52, 53, 59, 60, 61, 62, 63, C.I. I. Solvent Black 3, 5, 5: 2, 7, 13, 22, 22: 1, 26, 27, 28, 29, 34, 35, 43, 45, 46, 48, 49, 50, C.I. I. Acid Red 6, 11, 26, 60, 88, 111, 186, 215, C.I. I. Basic Red 1, 2, 13, 14, 22, 27, 29, 39, C.I. I. DirectRed 4, 23, 31, 75, 76, 79, 80, 81, 83, 84, 149, 224, C.I. I. DirectGreen 26, 28, C.I. I. DirectBlue 71, 78, 98, 106, 108, 192, 201, C.I. I. DirectViolet 51, C.I. I. Direct Yellow 26, 27, 28, 33, 44, 50, 86, 142, C.I. I. Direct Orange 26, 29, 34, 37, 72, C.I. I. SulfurRed 5, 6, 7, C.I. I. SulfurGreen 2, 3, 6, C.I. I. SulfurBlue 2, 3, 7, 9, 13, 15, C.I. I. Sulfur Violet 2, 3, 4, C.I. I. Sulfur Yellow 4, C.I. I. VatRed 13, 21, 23, 28, 29, 48, C.I. I. VatGreen 3, 5, 8, C.I. I. VatBlue 6, 14, 26, 30, C.I. I. VatViolet 1, 3, 9, 13, 15, 16, C.I. I. Vat Yellow 2, 12, 20, 33, C.I. I. Vat Orange 2, 5, 11, 15, 18, 20, C.I. I. Azoic Coupling Component 2, 3, 4, 5, 7, 8, 9, 10, 11, 13, 32, 37, 41, 48, C.I. I. Reactive Red 8, 22, 46, 120, C.I. I. Reactive Blue 1, 2, 7, 19, C.I. I. Reactive Violet 2, 4, C.I. I. Reactive Yellow 1, 2, 4, 14, 16, C.I. I. Reactive Orange 1, 4, 7, 13, 16, 20, C.I. I. Disperse Red 4, 11, 54, 55, 58, 65, 73, 127, 129, 141, 196, 210, 229, 354, 356, C.I. I. Disperse Orange 13, 29, 30. These dyes can be used alone or in combination of two or more in order to develop a desired spectral spectrum.

  The colored composition used for forming the colored pixel of the color filter of the present invention contains a binder resin and a resin precursor (hereinafter, monomer) as a pigment carrier.

  The binder resin is composed of a transparent resin, a precursor thereof, or a mixture thereof. The transparent resin is a resin having a transmittance of preferably 80% or more, more preferably 95% or more in the entire wavelength region of 400 to 700 nm in the visible light region. The transparent resin includes a thermoplastic resin, a thermosetting resin, and a photosensitive resin, and its precursor includes a monomer or an oligomer that is cured by irradiation with radiation to form a transparent resin. Alternatively, two or more kinds can be mixed and used.

  The binder resin can be used in an amount of 30 to 700 parts by weight, preferably 60 to 450 parts by weight with respect to 100 parts by weight of the pigment in the coloring composition. Moreover, when using the mixture of transparent resin and its precursor as binder resin, transparent resin is 20-400 weight part with respect to 100 weight part of pigments in a coloring composition, Preferably it is 50-250 weight part. Can be used. The precursor of the transparent resin can be used in an amount of 10 to 300 parts by weight, preferably 10 to 200 parts by weight, with respect to 100 parts by weight of the pigment in the coloring composition.

  Examples of the thermoplastic resin include butyral resin, styrene-maleic acid copolymer, chlorinated polyethylene, chlorinated polypropylene, polyvinyl chloride, vinyl chloride-vinyl acetate copolymer, polyvinyl acetate, polyurethane resin, and polyester resin. , Acrylic resins, alkyd resins, polystyrene, polyamide resins, rubber resins, cyclized rubber resins, celluloses, polyethylene, polybutadiene, polyimide resins, and the like. Examples of the thermosetting resin include epoxy resins, benzoguanamine resins, rosin-modified maleic acid resins, rosin-modified fumaric acid resins, melamine resins, urea resins, and phenol resins. Among these, acrylic resins are preferably used from the viewpoint of transparency.

  Active energy ray-curable resins include (meth) acrylic having a reactive substituent such as an isocyanate group, an aldehyde group, or an epoxy group on a linear polymer having a reactive substituent such as a hydroxyl group, a carboxyl group, or an amino group. A resin in which a photocrosslinkable group such as a (meth) acryloyl group or a styryl group is introduced into the linear polymer by reacting a compound or cinnamic acid is used. In addition, linear polymers containing acid anhydrides such as styrene-maleic anhydride copolymer and α-olefin-maleic anhydride copolymer can be made from (meth) acrylic compounds having hydroxyl groups such as hydroxyalkyl (meth) acrylate. Half-esterified products are also used.

  Monomers and oligomers that produce transparent resins include methyl (meth) acrylate, ethyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, cyclohexyl (meth) acrylate, β-carboxyl Ethyl (meth) acrylate, diethylene glycol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, triethylene glycol di (meth) acrylate, tripropylene glycol di (meth) acrylate, trimethylolpropane tri (meth) Acrylate, pentaerythritol tri (meth) acrylate, 1,6-hexanediol diglycidyl ether di (meth) acrylate, bisphenol A diglycidyl ether di (meth) acrylate Rate, neopentyl glycol diglycidyl ether di (meth) acrylate, dipentaerythritol hexa (meth) acrylate, tricyclodecanyl (meth) acrylate, ester acrylate, (meth) acrylic acid ester of methylolated melamine, epoxy (meth) Acrylic esters and methacrylic esters such as acrylate and urethane acrylate, (meth) acrylic acid, styrene, vinyl acetate, hydroxyethyl vinyl ether, ethylene glycol divinyl ether, pentaerythritol trivinyl ether, (meth) acrylamide, N-hydroxymethyl ( Examples include meth) acrylamide, N-vinylformamide, acrylonitrile and the like. These can be used alone or in admixture of two or more.

  As the monomer, known or commercially available monomers can be used without particular limitation. In particular, tri- or higher functional acrylic or methacrylic monomers are preferably used. For example, trimethylolpropane triacrylate, pentaerythritol triacrylate, pentaerythritol tetraacrylate, dipentaerythritol hexaacrylate, and urethane acrylate obtained by polyfunctionalization using trimethylolpropane triacrylate are preferably used.

  A thermosetting compound can also be used for the colored composition for forming the colored pixel according to the present invention. By using a thermosetting compound, chemical resistance and environmental resistance can be imparted. Examples of the thermosetting compound include epoxy, rosin-modified maleic resin, rosin-modified fumaric acid resin, melamine compound, melamine resin, urea resin, phenol resin, and isocyanate compound. Among them, epoxy compounds, melamine, melamine compounds obtained by condensing melamine, isocyanate compounds, and blocked isocyanate compounds in which isocyanate groups are protected with a blocking agent are suitable. In any case, a polyfunctional compound having two or more heat-reactive functional groups per molecule is preferred, and a tetrafunctional or more functional compound is more preferred.

  The epoxy compound can be used without particular limitation, and can be selected from known ones. The number of epoxy groups is not particularly limited, but those having two or more functional groups are preferred, and more preferably tetrafunctional or more. Examples thereof include Celoxide 2021P, Celoxide 3000, EHPE-3150 (manufactured by Daicel Chemical Industries, Ltd.), AK601, EPPN series (manufactured by Nippon Kayaku Co., Ltd.), and the like.

  Melamine can be used without particular limitation, and can be selected from known melamines. For example, melamine compounds are exemplified below.

［式中、Ｒ₁、Ｒ_２、Ｒ_３はそれぞれ水素原子、メチロール基、アルコキシメチル基、アルコキシｎ‐ブチル基、Ｒ_４、Ｒ_５、Ｒ_６はそれぞれメチロール基、アルコキシメチル基、アルコキシｎ‐ブチル基であるが、Ｒ_１からＲ_６はアルコキシメチル基、アルコキシｎ‐ブチル基であることがより好ましい。］
二種類以上の繰り返し単位を組み合わせたコポリマーを用いてもよい。二種類以上のホモポリマーまたはコポリマーを併用してもよい。また、上記以外に１，３，５‐トリアジン環を有する化合物で例えば特開２００１‐１６６１４４公報に記載のものを使用することができる。また化式２に示す化合物も好んで用いられる。

[Wherein R ₁ , R ₂ and R ₃ are a hydrogen atom, a methylol group, an alkoxymethyl group, an alkoxy n-butyl group, R ₄ , R ₅ and R ₆ are a methylol group, an alkoxymethyl group and an alkoxy n- Although it is a butyl group, R ₁ to R ₆ are more preferably an alkoxymethyl group or an alkoxy n-butyl group. ]
A copolymer combining two or more kinds of repeating units may be used. Two or more homopolymers or copolymers may be used in combination. In addition to the above, compounds having a 1,3,5-triazine ring, for example, those described in JP-A-2001-166144 can be used. A compound represented by Formula 2 is also preferably used.

［Ｒ_７からＲ_１４はそれぞれ独立に、水素原子、アルキル基、アルケニル基、アリール基または複素環基であり、水素原子であることが特に好ましい。］
さらには、メラミン樹脂とイソシアネート基を含有する化合物、（及び／または）酸無水物とを反応させてなるメラミン化合物であり、該メラミン化合物の質量平均分子量が２５００以上かつ固形分酸価が６０ｍｇＫＯＨ／ｇ以下であるとより好適である。従来のメラミン樹脂を多量に配合すると、感光性樹脂組成物の感度が低下して、十分な硬化に必要な露光時間が長くなり、生産性が悪くなるという問題があった。さらに、感光性樹脂組成物のアルカリ現像性が悪化し、現像速度が適度に調整できず現像時間が長くなることや、逆に現像速度が速すぎて塗膜が基板から剥がれやすくなるといった不具合を生じることから、メラミン樹脂の添加量には限度があり、十分な熱硬化性樹脂の効果を発揮させることが難しくなる。

[R ₇ to R ₁₄ each independently represents a hydrogen atom, an alkyl group, an alkenyl group, an aryl group or a heterocyclic group, and particularly preferably a hydrogen atom. ]
Furthermore, it is a melamine compound obtained by reacting a melamine resin, a compound containing an isocyanate group, and / or an acid anhydride, and the melamine compound has a mass average molecular weight of 2500 or more and a solid content acid value of 60 mgKOH / It is more preferable that it is g or less. When a large amount of conventional melamine resin is blended, there is a problem that the sensitivity of the photosensitive resin composition decreases, the exposure time necessary for sufficient curing becomes long, and the productivity is deteriorated. Furthermore, the alkali developability of the photosensitive resin composition deteriorates, the development speed cannot be adjusted appropriately, the development time becomes longer, and conversely, the development speed is too high and the coating film is easily peeled off from the substrate. As a result, there is a limit to the amount of melamine resin added, making it difficult to exhibit the effect of a sufficient thermosetting resin.

  Isocyanate compounds can be used without particular limitation, and can be selected from known ones. The number of isocyanate groups is not particularly limited, and examples thereof include aliphatic, aromatic or alicyclic mono- or diisocyanate and triisocyanate compounds.

Since isocyanate has high reactivity, in view of pod life, a blocked isocyanate in which an isocyanate group is protected with a blocking agent is suitable. Examples of the blocked isocyanate include compounds in which an isocyanate group is blocked using a blocking agent having a phenol group, an imidazole group, a pyrazole group, an oxime group, a lactam group, an alcohol group, or the like with respect to the isocyanate group. The blocking agent may be any as long as the water-soluble vinyl resin is stable in an aqueous solution and the isocyanate group is unblocked at about 100 ° C. to 200 ° C. Methyl salicylate and imidazole containing a phenol group Examples include imidazole containing a group, 3,5-dimethylpyrazole containing a pyrazole group, methyl ethyl ketone oxime containing an oxime group, ε-caprolactam containing a lactam group, and ethylhexanol containing an alcohol group. is not. Examples thereof include BURNOCK DB-980K (manufactured by DIC), Duranate TPA-B80E (manufactured by Asahi Kasei Chemicals), and KA-1000 (manufactured by Sanyo Chemical).

  The above thermosetting compounds may be integrated with the binder resin. For example, an epoxy group or an isocyanate group is incorporated as a unit structure in the binder resin. Although it may be incorporated in any form, an example in which it is incorporated in an acrylic resin will be shown as an example.

  As an example of introducing an epoxy group into an acrylic resin, as an acrylic monomer having an epoxy group, glycidyl acrylate, glycidyl (meth) acrylate, or vinylcyclohexene monooxide 1,2-epoxy-4-vinylcyclohexane (Celoxide 2000 Z Daicel Chemical) And a method using an industrial company). Examples of introducing isocyanate groups or blocked isocyanate groups include 2-isocyanatoethyl (meth) acrylate (Karenz MOI Showa Denko) and Karenz MOI-EG (Showa Denko) as acrylic monomers having these functional groups. And a method using 2- (0- [1′-methylpropylideneamino] carboxyamino) ethyl methacrylate (Karenz MOI-BM, Showa Denko) containing a blocked isocyanate group. These thermosetting compounds and pigment-dispersed resin integrated compounds can also be used in combination with the aforementioned thermosetting compounds.

  5 mass%-50 mass% are suitable for content of these thermosetting compounds in solid content of a coloring composition. More preferably, it is 5%-40%, More preferably, it is 10 mass%-40 mass%. If the thermosetting compound is less than 5% by mass, the amount of the thermosetting compound is too small, and the colored pixels are not sufficiently cured in the post-baking process in the color filter manufacturing process. When heating in the process (heating during sputtering or heating for subsequent annealing), the colored pixels shrink due to heat, and stress is generated between the transparent conductive film, causing wrinkles and cracks. Become. On the other hand, when the content of the thermosetting compound exceeds 50% by mass, the thermosetting compound undergoes a thermal reaction due to heating in the film forming step of the transparent conductive film, and the transmittance decreases due to yellowing associated therewith. Furthermore, many thermosetting compounds are not designed with a molecular design that takes into account the developability in the photolithographic process (specifically, they do not have an acidic group for imparting alkali solubility, etc.). When used as a product, the developability is inferior, causing a residue and the like.

  In order to apply the colored composition used for forming the colored pixels of the color filter according to the present invention so that the dry film thickness is 0.2 to 5 μm, one or more organic solvents are used. Can do. The organic solvent is selected in consideration of viscosity, surface tension, boiling point, solubility parameter, and the like from the viewpoints of applicability, drying property, film thickness uniformity, wettability and the like when applying the colored composition. For example, cyclohexanone, ethyl cellosolve acetate, butyl cellosolve acetate, 1-methoxy-2-propyl acetate, 1-ethoxy-2-propyl acetate, ethylene glycol monomethyl ether, ethylene glycol monomethyl ether acetate, ethylene glycol dimethyl ether, diethylene glycol dimethyl ether, propylene glycol monomethyl ether , Propylene glycol monomethyl ether acetate, propylene glycol dimethyl ether, ethyl lactate, methyl lactate, ethylbenzene, xylene, ethyl cellosolve, methyl-n amyl ketone, propylene glycol monomethyl ether toluene, methyl ethyl ketone, ethyl acetate, isoamyl acetate, methanol, ethanol, isopropyl Alcohol, butanol, isobutyl ketone, but such petroleum solvents include, but are not limited to. The organic solvent can be used in an amount of 800 to 4000 parts by weight, preferably 1000 to 2500 parts by weight, with respect to 100 parts by weight of the total color materials in the coloring composition.

  The coloring composition used for forming the colored pixel of the color filter according to the present invention may be a photosensitive composition. For example, a colored photosensitive composition for a color filter using at least one photopolymerization initiator and at least one photopolymerizable compound in addition to the above-described colored composition for a color filter.

  As photopolymerization initiators, 4-phenoxydichloroacetophenone, 4-t-butyl-dichloroacetophenone, diethoxyacetophenone, 1- (4-isopropylphenyl) -2-hydroxy-2-methylpropan-1-one, 1- Acetophenone compounds such as hydroxycyclohexyl phenyl ketone, 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butan-1-one, benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzyl Benzoin compounds such as dimethyl ketal, benzophenone, benzoylbenzoic acid, methyl benzoylbenzoate, 4-phenylbenzophenone, hydroxybenzophenone, acrylated benzophenone, 4-benzoyl Benzophenone compounds such as 4′-methyldiphenyl sulfide, 3,3 ′, 4,4′-tetra (t-butylperoxycarbonyl) benzophenone, thioxanthone, 2-chlorothioxanthone, 2-methylthioxanthone, isopropylthioxanthone, 2, Thioxanthone compounds such as 4-diisopropylthioxanthone and 2,4-diethylthioxanthone, 2,4,6-trichloro-s-triazine, 2-phenyl-4,6-bis (trichloromethyl) -s-triazine, 2- ( p-methoxyphenyl) -4,6-bis (trichloromethyl) -s-triazine, 2- (p-tolyl) -4,6-bis (trichloromethyl) -s-triazine, 2-piperonyl-4,6- Bis (trichloromethyl) -s-triazine, 2,4-bi (Trichloromethyl) -6-styryl-s-triazine, 2- (naphth-1-yl) -4,6-bis (trichloromethyl) -s-triazine, 2- (4-methoxy-naphth-1-yl) Such as -4,6-bis (trichloromethyl) -s-triazine, 2,4-trichloromethyl- (piperonyl) -6-triazine, 2,4-trichloromethyl (4'-methoxystyryl) -6-triazine Compounds, 1,2-octanedione, 1- [4- (phenylthio)-, 2- (O-benzoyloxime)], O- (acetyl) -N- (1-phenyl-2-oxo-2- ( Oxime ester compounds such as 4'-methoxy-naphthyl) ethylidene) hydroxylamine, bis (2,4,6-trimethylbenzoyl) phenylphosphine oxide Phosphine compounds such as 2,4,6-trimethylbenzoyldiphenylphosphine oxide, quinone compounds such as 9,10-phenanthrenequinone, camphorquinone, ethylanthraquinone, borate compounds, carbazole compounds, imidazole compounds , Titanocene compounds and the like are used. These photopolymerization initiators can be used alone or in combination. A photoinitiator can be used in the amount of 5-200 weight part with respect to a total of 100 weight part of the pigment in a coloring composition, Preferably it is 10-150 weight part.

The photopolymerization initiator may be used alone or in combination of two or more, or as a sensitizer, triethanolamine, methyldiethanolamine, triisopropanolamine, methyl 4-dimethylaminobenzoate, ethyl 4-dimethylaminobenzoate, Isoamyl 4-dimethylaminobenzoate, 2-dimethylaminoethyl benzoate, 2-ethylhexyl 4-dimethylaminobenzoate, N, N-dimethylparatoluidine, 4,4'-bis (dimethylamino)
Amine compounds such as benzophenone, 4,4′-bis (diethylamino) benzophenone, and 4,4′-bis (ethylmethylamino) benzophenone can also be used in combination. These sensitizers can be used alone or in combination. The sensitizer can be used in an amount of 0.1 to 60 parts by weight with respect to 100 parts by weight of the photopolymerization initiator in the colored composition.

  Furthermore, a polyfunctional thiol that functions as a chain transfer agent can be contained. The polyfunctional thiol may be a compound having two or more thiol groups. For example, hexanedithiol, decanedithiol, 1,4-butanediol bisthiopropionate, 1,4-butanediol bisthioglycolate, ethylene Glycol bisthioglycolate, ethylene glycol bisthiopropionate, trimethylolpropane tristhioglycolate, trimethylolpropane tristhiopropionate, trimethylolpropane tris (3-mercaptobutyrate), pentaerythritol tetrakisthioglycolate, Pentaerythritol tetrakisthiopropionate, tris (2-hydroxyethyl) isocyanurate, trimercaptopropionate, 1,4-dimethylmercaptobenzene, 2,4,6-trimerca DOO -s- triazine, 2- (N, N- dibutylamino) -4,6-dimercapto--s- triazine. These polyfunctional thiols can be used alone or in combination. The content of the polyfunctional thiol is preferably 0.05 to 100 parts by weight, preferably 0.1 to 60 parts by weight with respect to 100 parts by weight of the total pigment in the coloring composition.

  The photopolymerizable compound is a compound that can be polymerized by an active radical or an acid generated from a photopolymerization initiator by light irradiation. Examples of the photopolymerizable compound include compounds having a polymerizable carbon-carbon unsaturated bond.

  As the photopolymerizable compound, a known photopolymerizable compound can be used without particular limitation. As the photopolymerizable compound, a compound having at least one addition-polymerizable ethylenic double bond and having a boiling point of 100 ° C. or higher under normal pressure is preferable. It is more preferable that it is a (meth) acryl compound. From the viewpoint of sensitivity and high curing, the photopolymerizable compound is more preferably a polyfunctional (meth) acrylic compound.

  Examples of photopolymerizable compounds include monofunctional acrylates and methacrylates such as polyethylene glycol mono (meth) acrylate, polypropylene glycol mono (meth) acrylate, and phenoxyethyl (meth) acrylate; polyethylene glycol di (meth) acrylate, Methylolethane tri (meth) acrylate, neopentyl glycol di (meth) acrylate, pentaerythritol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meth) acrylate , Hexanediol di (meth) acrylate, trimethylolpropane tris (acryloyloxypropyl) ether, tris (acryloilo) Shiechiru) isocyanurate, such as those (meth) acrylated after adding ethylene oxide or propylene oxide to a polyfunctional alcohol such as glycerin or trimethylol ethane.

  The colored composition used for forming the colored pixel of the color filter according to the present invention may contain a storage stabilizer in order to stabilize the viscosity with time of the composition, and also adheres to the transparent substrate. In order to improve the property, an adhesion improving agent such as a silane coupling agent may be contained. Examples of storage stabilizers include quaternary ammonium chlorides such as benzyltrimethyl chloride and diethylhydroxyamine, organic acids such as lactic acid and oxalic acid, and methyl ethers thereof, t-butylpyrocatechol, tetraethylphosphine, and tetraphenylphosphine. Organic phosphines, phosphites and the like can be mentioned.

  Examples of the silane coupling agent include vinyl silanes such as vinyltris (β-methoxyethoxy) silane, vinylethoxysilane and vinyltrimethoxysilane, (meth) acrylsilanes such as γ-methacryloxypropyltrimethoxysilane, β- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, β- (3,4-epoxycyclohexyl) methyltrimethoxysilane, β- (3,4-epoxycyclohexyl) ethyltriethoxysilane, β- (3,4- Epoxy cyclohexyl) methyltriethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropyltriethoxysilane and other epoxy silanes, N-β (aminoethyl) γ-aminopropyltrimethoxysilane, N- β (aminoethyl) γ-aminopropyltriethoxysilane, N-β (aminoethyl) γ-aminopropylmethyldiethoxysilane, γ-aminopropyltriethoxysilane, γ-aminopropyltrimethoxysilane, N-phenyl-γ-aminopropyltri Examples thereof include aminosilanes such as methoxysilane and N-phenyl-γ-aminopropyltriethoxysilane, and thiosilanes such as γ-mercaptopropyltrimethoxysilane and γ-mercaptopropyltriethoxysilane.

  The color filter according to the present invention has a transparent overcoat layer on the colored pixels.

<Overcoat layer>
For example, a thermosetting resin using an epoxy resin and a curing agent can be used for the transparent resin composition of the present invention. As the curing agent to be used, an anhydride of carboxylic acid can be used.

  Examples of the carboxylic acid include cyclohexane-1,2,4-tricarboxylic acid, cyclohexane-1,3,5-tricarboxylic acid, cyclohexane-1,2,3-tricarboxylic acid, and the like. The cyclohexanetricarboxylic acid anhydride includes cyclohexane-1,3,4-tricarboxylic acid-3,4-anhydride, cyclohexane-1,3,5-tricarboxylic acid-3,5-anhydride, cyclohexane-1, Examples include 2,3-tricarboxylic acid-2,3-anhydride. In the present invention, among these, cyclohexane-1,2,4-tricarboxylic acid, cyclohexane-1,3,5-tricarboxylic acid or cyclohexane-1,3,4-tricarboxylic acid-3,4-anhydride is used. It can be preferably used. These compounds can be used alone or in appropriate combination. These compounds can be synthesized, for example, by hydrogenation of benzenetricarboxylic acid such as trimellitic acid.

  In addition, alicyclic acid anhydrides such as methylhexahydrophthalic anhydride, methyltetrahydrophthalic anhydride, hexahydrophthalic anhydride, and tetrahydrophthalic anhydride can be used.

  In the transparent resin composition of the present invention, an epoxy resin or a polymer having an epoxy group can be used alone or in combination of two or more as an epoxy group-containing resin.

Examples of the epoxy resin include bisphenol A type epoxy resin, bisphenol F type epoxy resin, cresol novolac type epoxy resin, phenol novolac type epoxy resin, biphenyl type epoxy resin, stilbene type epoxy resin, hydroquinone type epoxy resin, and naphthalene skeleton type epoxy. Resin, tetraphenylolethane type epoxy resin, DPP (zie n-pentylphthalate) type epoxy resin, trishydroxyphenylmethane type epoxy resin, dicyclopentadienephenol type epoxy resin, 3,4-epoxycyclohexylmethyl-3 ′, 4 '-Epoxycyclohexanecarboxylate and alicyclic epoxy resins such as vinylcyclohexene diepoxide, TGPS (triglycidoxyphenylsilane) and 3-glycidoxy Silicon-containing epoxy resins such as propyltrimethoxysilane, diglycidyl ether of bisphenol A ethylene oxide adduct, diglycidyl ether of bisphenol A propylene oxide adduct, cyclohexanedimethanol diglycidyl ether, polyglycidyl ether of aliphatic polyhydric alcohol; Polyglycidyl ester of polybasic acid such as diglycidyl ester of hexahydrophthalic anhydride, alkyl glycidyl ether such as butyl glycidyl ether, lauryl glycidyl ether, glycidyl ether having one epoxy group such as phenyl glycidyl ether, cresyl glycidyl ether, etc. Is mentioned. Moreover, the nuclear hydrogenation product of the said epoxy resin can also be used.

These compounds can be used alone or in combination of two or more.
In the present invention, good curing properties can be obtained without using a curing accelerator, but a curing accelerator can also be used as appropriate. Examples of the curing accelerator that can be added include tertiary amines such as benzyldimethylamine, tris (dimethylaminomethyl) phenol, and dimethylcyclohexylamine; 1-cyanoethyl-2-ethyl-4-methylimidazole, 2-ethyl- Imidazoles such as 4-methylimidazole and 1-benzyl-2-methylimidazole; Organophosphorus compounds such as triphenylphosphine and triphenyl phosphite; Quaternary such as tetraphenylphosphonium bromide and tetra-n-butylphosphonium bromide Phosphonium salts; diazabicycloalkenes such as 1,8-diazabicyclo [5.4.0] undecene-7 and organic acid salts thereof; organometallic compounds such as zinc octylate, tin octylate, and aluminum acetylacetone complex; Tetraethylammoni Arm bromide, quaternary ammonium salts such as tetrabutylammonium bromide; boron trifluoride, boron compounds such as triphenyl borate; zinc chloride, metal halides such as stannic chloride. These curing accelerators can be used alone or in combination of two or more.
The transparent resin composition forming the overcoat layer may have photocurability by containing the aforementioned active energy ray-curable resin. The organic solvent for imparting coating properties is the same as that of the colored composition.

The transparent resin composition according to the present invention has a resistivity of 1.0 × 10 ^{10 to} 1.0 × 10 ¹³ when applied at a film thickness of 2.0 μm. As a method for imparting conductivity, any method may be used, but a more preferable method will be described below.

  First, a method of adding fine metal particles to the transparent resin composition can be mentioned. The shape of the fine particles may be any shape, but a wire shape is preferable. The size of the fine particles is preferably 180 nm or less, more preferably 150 nm or less, and still more preferably 100 nm or less.

  If it exceeds 180 nm, the light is scattered, leading to a decrease in contrast. On the other hand, the size of the fine particles is preferably 10 nm or more, more preferably 20 nm or more, and more preferably 40 nm or more. If the thickness is less than 10 nm, the fine particles are likely to aggregate, and the influence of surface plasmons is also not suitable.

  The type of metal is not particularly limited, but gold, silver, platinum, palladium, iron, copper, tin, lead, and the like can be suitably used. Further suitable among these is silver. The metal fine particles may be produced by any manufacturing method.

  The addition amount of the metal fine particles is within 3% by mass to 30% by mass. If it is less than 3%, sufficient conductivity cannot be ensured. If it exceeds 30%, the thixotropy is changed by the fine particles, and the flatness after the overcoat is applied cannot be maintained.

Next, the conductivity can be imparted by reducing the insulating property by the unit structure of the resin or the additive in the transparent resin composition.

  As a method of adjusting by the unit structure of the resin, it is possible to introduce a unit structure having a molecular structure with large polarization. Examples of the unit structure in the acrylic resin include carboxylic acid, sulfonic acid and salts thereof, amino group, nitrile group, nitro group and the like. Specific monomers for synthesizing the resin include acrylic acid, 2-cyanoethyl acrylate, 2-hydroxy-3-methacryloxypropyltrimethylammonium chloride, EO-modified methacrylic acrylate, sodium ethoxy sulfonate, sodium ethoxy sulfonate Methacrylate, N-vinylcaprolactam, N-vinylpyrrolidone and the like can be mentioned.

  More preferably, it is a method of adjusting with carboxylic acid. The amount of carboxylic acid introduced can be defined as the acid value. The acid value is represented by the mass of potassium hydroxide necessary to neutralize the acidic component contained in 1 g of the resin. The unit is mg (KOH) / g, and the measurement method is described in JISK2501. The acid value is preferably 150 to 400. More preferably, it is 200-300. When the acid value is 400 or more, the stability of the transparent resin composition is deteriorated, which is not suitable. When the acid value is 100 or less, the effect of imparting conductivity is lost.

  In order to adjust conductivity with an additive, the insulation can be lowered by adding a polymerization inhibitor, an antioxidant, a quaternary amine salt, or the like. Examples of the polymerization inhibitor include hydroquinone and derivatives thereof, 4-methoxyphenol, phenothiazine and derivatives thereof. Antioxidants include amine-based antioxidants and phenol-based antioxidants, amine-based antioxidants include diphenylamine and derivatives thereof, phenylenediamine and derivatives thereof, and phenol-based antioxidants include cresol. And derivatives thereof, amylhydroquinone and derivatives thereof, and bisphenol compounds.

<Color filter>
In the color filter according to this embodiment, the colored pixels preferably have a thickness of 0.1 μm to 5.0 μm, more preferably 0.5 μm to 4.0 μm, and still more preferably 1.0 μm to 3.5 μm. That is, when the blue pixel according to the present invention is formed by photolithography, it is difficult to form the pixel if the film thickness is less than 0.1 μm, and if the film thickness is more than 5 μm, the composition is applied to the coating film. This is because it becomes difficult to form and apply.

  The color filter which concerns on this embodiment comprises the colored pixel which consists of a colored coating film formed using the coloring composition for color filters mentioned above on the transparent base material. Further, an overcoat layer is provided on the colored pixel, and a transparent electrode is formed thereon.

  That is, as shown in FIG. 2, the color filter includes a black matrix 22 that is a light shielding film and a colored pixel 3 on a transparent substrate 21 such as glass. The colored pixel 23 includes a blue pixel 23B, a red pixel 23R, and a green pixel 23G formed using the above-described blue coloring composition. An overcoat layer 24 is formed thereon, and a transparent electrode 25 is formed thereon.

  As the transparent substrate, glass plates such as soda lime glass, low alkali borosilicate glass and non-alkali aluminoborosilicate glass, and resin plates such as polycarbonate, polymethyl methacrylate, and polyethylene terephthalate are used. In addition, when the color filter according to the present invention is incorporated in a liquid crystal display device, a transparent electrode made of indium oxide, tin oxide, or the like is formed on the surface of a glass plate or a resin plate for driving a liquid crystal after forming the liquid crystal panel. It may be.

  The formation of the colored pixels can be performed by, for example, a printing method, an ink jet method, a photolithography method, or the like.

  The formation of each color coloring pixel by the printing method can be patterned simply by repeating the printing and drying of the colored composition prepared as the above-mentioned various printing inks. Therefore, the color filter manufacturing method is low cost and excellent in mass productivity. ing. Furthermore, it is possible to print a fine pattern having high dimensional accuracy and smoothness by the development of printing technology. In order to perform printing, it is preferable that the ink does not dry and solidify on the printing plate or on the blanket. Control of ink fluidity on a printing press is also important, and ink viscosity can be adjusted with a dispersant or extender pigment.

  As a method for manufacturing a color filter using an inkjet method, a method is proposed in which a black matrix is formed on a glass substrate, and ink is applied to the openings of the black matrix using an inkjet printing apparatus to form a colored portion. . Further, in this method, the material constituting the black matrix is made of a repellent material such as a fluorine compound or a silicon compound so that the ink is accurately filled into the predetermined opening and the mixed color in which the ink is mixed between the adjacent colored portions does not occur. Water material may be included.

  As an apparatus used for inkjet, there are a piezo conversion method and a heat conversion method depending on a difference in an ink discharge method. In addition, the ink particleization frequency in the ink jet apparatus is about 5 to 100 KHz. The nozzle diameter in the ink jet apparatus is desirably about 5 to 80 μm. In addition, the ink jet apparatus may be one in which a plurality of heads are arranged and about 60 to 500 nozzles are incorporated in one head.

  After the colored portion pattern is formed by the ink jet method, a colored layer pattern is formed by heat treatment using a convection oven, an IR oven, a hot plate, or the like. According to the ink jet method, since a plurality of colors of ink can be applied simultaneously, it is possible to manufacture a color filter at a low cost by a simple process.

  When each color pixel is formed by photolithography, the colored composition prepared as the solvent development type or alkali development type color resist is applied on a transparent substrate by spray coating, spin coating, slit coating, roll coating or the like. By a method, it apply | coats so that a dry film thickness may be set to 0.2-10 micrometers. When drying the coating film, a vacuum dryer, a convection oven, an IR oven, a hot plate, or the like may be used. If necessary, the dried film is exposed to ultraviolet light through a pattern exposure photomask having a predetermined pattern provided in contact with or non-contact with the film.

  Then, after immersing in a solvent or alkali developer or spraying the developer by spraying or the like to remove the uncured portion to form a desired pattern, the same operation is repeated for other colors to produce a color filter. be able to. In developing the colored composition, an aqueous solution such as sodium carbonate or sodium hydroxide is used as an alkali developer, and an organic alkali such as dimethylbenzylamine or triethanolamine can also be used. Moreover, an antifoamer and surfactant can also be added to a developing solution. As a development processing method, a shower development method, a spray development method, a dip (immersion) development method, a paddle (liquid accumulation) development method, or the like can be applied.

  In order to increase the sensitivity of the film during UV exposure, the colored resist is applied and dried, and then water-soluble or alkaline water-soluble resin such as polyvinyl alcohol or water-soluble acrylic resin is applied and dried to prevent polymerization inhibition by oxygen. After the film to be formed is formed, ultraviolet exposure can be performed.

  The electrodeposition method is a method for producing a color filter by using a transparent conductive film formed on a transparent substrate and electrodepositing colored pixels on the transparent conductive film by electrophoresis of colloidal particles.

  The transfer method is a method in which colored pixels are formed in advance on the surface of a peelable transfer base sheet or transfer cylinder, and the colored pixels are transferred to a desired transparent substrate.

  If a black matrix is formed in advance before forming each color-colored pixel on the transparent substrate or the reflective substrate, the contrast of the display panel can be further increased. As the black matrix, an inorganic film such as chromium, a chromium / chromium oxide multilayer film, titanium nitride, or a resin film in which a light shielding agent is dispersed may be used.

  A known material can be used for the transparent conductive film without any particular limitation. Of these, ITO is particularly preferably used. Most of the transparent conductive films are formed on the color filter by sputtering or the like, but many of them are formed while being heated, or an annealing process is required after the film formation. As described above, the heating when forming the transparent conductive film includes the method of simultaneously heating during sputtering (heating sputtering) and the method of post-heating after sputtering (annealing), but there is also a method using both of them. That is, it is a method in which a transparent conductive film is formed by heat sputtering and then annealing is further performed.

  When the color filter according to the present invention is incorporated in a display device, an electrode (thin film transistor: TFT) is formed in advance on the transparent substrate or the reflective substrate, and then a colored pixel can be formed. By forming colored pixels on the electrode substrate, the aperture ratio can be increased and the luminance can be improved.

  A columnar spacer or the like may be formed in the color filter according to the present invention as necessary.

EXAMPLES Examples and comparative examples of the present invention will be shown below to describe the present invention more specifically. However, the present invention is not limited to the following examples. In the examples, “parts” and “%” represent “parts by mass” and “mass%”, respectively. The symbol of the pigment indicates a color index number. For example, “PR254” represents “CI. PigmentRed 254” and “PB15: 6” represents “CI. PigmentBlue 15: 6”.
Production examples of dyes and pigments are shown below.

<Coloring composition>
The following were used for the coloring agent for coloring the coloring composition used for color filter preparation.

Red pigment: C.I. I. Pigment Red 254
("Ilgar For Red B-CF" manufactured by Ciba Specialty Chemicals)
: C.I. I. Pigment Red 177
("Chromophthal Red A2B" manufactured by Ciba Specialty Chemicals)
Green pigment: C.I. I. Pigment Green 58
("Phthalocyanine Green A110" manufactured by DIC; G-1)
Blue pigment: C.I. I. Pigment Blue 15: 6
("Rionol Blue ES" manufactured by Toyo Ink Co., Ltd.)
Yellow pigment: C.I. I. Pigment Yellow 150
("YELLOW PIGMENT E4GN" manufactured by LANXESS; Y-1)
<Production Example 1>
100 parts of diketopyrrolopyrrole red pigment PR254 (“Irgafore Red B-CF” manufactured by Ciba Specialty Chemicals)
Pigment derivative (D-1) 10 parts ground salt 1000 parts diethylene glycol 120 parts were charged in a stainless steel 1 gallon kneader (Inoue Seisakusho) and kneaded at 60 ° C. for 10 hours.

  The mixture was poured into 2000 parts of warm water, stirred at a high speed mixer for about 1 hour while being heated to about 80 ° C. to form a slurry, filtered and washed repeatedly to remove salt and solvent, and then at 24 ° C. for 24 hours. Drying for a period of time yielded a refined pigment (R-1). The average particle diameter of the obtained pigment was 25 nm.

＜製造例２＞
アントラキノン系赤色顔料ＰＲ１７７ １００部（チバスペシャリティケミカルズ社製「クロモフタールレッドＡ２Ｂ」）
色素誘導体（Ｄ‐２） ８部粉砕した食塩 ７００部ジエチレングリコール １８０部をステンレス製１ガロンニーダー（井上製作所製）に仕込み、７０℃で４時間混練した。

<Production Example 2>
100 parts of anthraquinone red pigment PR177 (“Chromoval Red A2B” manufactured by Ciba Specialty Chemicals)
Pigment derivative (D-2) 8 parts pulverized salt 700 parts diethylene glycol 180 parts were charged in a stainless steel 1 gallon kneader (Inoue Seisakusho) and kneaded at 70 ° C for 4 hours.

  The mixture was poured into 4000 parts of warm water, stirred with a high speed mixer for about 1 hour while being heated to about 80 ° C. to form a slurry, filtered and washed repeatedly to remove salt and solvent, and then at 80 ° C. for 24 hours. It dried and obtained the refined pigment (R-2). The average particle diameter of the obtained pigment was 30 nm.

＜製造例３＞
青色顔料：Ｃ．Ｉ．ＰｉｇｍｅｎｔＢｌｕｅ１５：６ ２００部
東洋インキ製造社製「ＬＩＯＮＯＬＢＬＵＥＥＳ」
塩化ナトリウム １６００部ジエチレングリコール（東京化成社製） １００部をステンレス製１ガロンニーダー（井上製作所社製）に仕込み、７０℃で１２時間混練した。次に、この混合物を約５リットルの温水に投入し、約７０℃に加熱しながらハイスピードミキサーで約１時間撹拌してスラリー状とした後、濾過し、水洗して塩化ナトリウム及びジエチレングリコールを除き、８０℃で２４時間乾燥し、１９８部のソルトミリング処理顔料（青色顔料Ｂ‐１）を得た。

<Production Example 3>
Blue pigment: C.I. I. Pigment Blue 15: 6 200 parts "LIONOLBLUEES" manufactured by Toyo Ink Manufacturing Co., Ltd.
Sodium chloride 1600 parts diethylene glycol (manufactured by Tokyo Chemical Industry Co., Ltd.) 100 parts were charged into a stainless steel 1 gallon kneader (manufactured by Inoue Seisakusho) and kneaded at 70 ° C. for 12 hours. Next, this mixture is poured into about 5 liters of warm water, stirred in a high speed mixer for about 1 hour while being heated to about 70 ° C. to form a slurry, filtered, washed with water to remove sodium chloride and diethylene glycol. And dried at 80 ° C. for 24 hours to obtain 198 parts of a salt milled pigment (blue pigment B-1).

<Manufacture of acrylic resin solution>
<Production Example 4>
Below, preparation of the acrylic resin solution (P-1) used by the Example and the comparative example is demonstrated. The molecular weight of the resin is a weight average molecular weight in terms of polystyrene measured by GPC (gel permeation chromatography).

In the reaction vessel,
Add 370.0 parts of cyclohexanone, heat to 80 ° C. while injecting nitrogen gas into the container, and at the same temperature, methacrylic acid (MAA) 20.0 parts methyl methacrylate (MMA) 10.0 parts benzyl methacrylate (BzMA) 55 0.0 part 2-hydroxyethyl methacrylate (HEMA) A mixture of 15.0 parts 2,2′-azobisisobutyronitrile (4.0 parts) was added dropwise over 1 hour to conduct a polymerization reaction.

After the completion of the dropwise addition, the mixture was further reacted at 80 ° C. for 3 hours,
A solution in which 1.0 part of azobisisobutyronitrile was dissolved in 50 parts of cyclohexanone was added, and the reaction was further continued at 80 ° C. for 1 hour to obtain an acrylic resin solution. The weight average molecular weight of the acrylic resin is about 20000, and the acid value is 130 [mgKOH / g].

  After cooling to room temperature, about 2 g of the resin solution was sampled, heated and dried at 180 ° C. for 20 minutes to measure the nonvolatile content, and cyclohexanone was added to the previously synthesized resin solution so that the nonvolatile content was 20% by weight. Then, an acrylic resin solution (P-1) was prepared.

<Production Example 5>
Below, preparation of the acrylic resin solution (P-2) used by the Example and the comparative example is demonstrated. The molecular weight of the resin is a weight average molecular weight in terms of polystyrene measured by GPC (gel permeation chromatography).

Place 370.0 parts of cyclohexanone in a reaction vessel and heat to 80 ° C. while injecting nitrogen gas into the vessel.
Methacrylic acid (MAA) 40.0 parts Methyl methacrylate (MMA) 10.0 parts Benzyl methacrylate (BzMA) 20.0 parts 2-Hydroxyethyl methacrylate (HEMA) 15.0 parts 2,2′-azobisisobutyronitrile 4.0 parts of the mixture was added dropwise over 1 hour to conduct a polymerization reaction.

After the completion of the dropwise addition, the mixture was further reacted at 80 ° C. for 3 hours,
A solution in which 1.0 part of azobisisobutyronitrile was dissolved in 50 parts of cyclohexanone was added, and the reaction was further continued at 80 ° C. for 1 hour to obtain an acrylic resin solution. The acrylic resin has a weight average molecular weight of about 20,000 and an acid value of 260 [mgKOH / g].

  After cooling to room temperature, about 2 g of the resin solution was sampled, heated and dried at 180 ° C. for 20 minutes to measure the nonvolatile content, and cyclohexanone was added to the previously synthesized resin solution so that the nonvolatile content was 20% by weight. An acrylic resin solution (P-2) was prepared.

<Preparation of pigment dispersion>
<Production Example 6>
The mixture having the composition shown in Table 1 was uniformly stirred and mixed, and then dispersed with an Eiger mill for 2 hours using zirconia beads having a diameter of 0.1 mm, and then filtered with a 5 μm filter to prepare a pigment dispersion.

＜着色組成物の調製＞
＜製造例７＞
下記組成の混合物を均一になるように攪拌混合した後、５μｍのフィルタで濾過して赤色着色組成物（ＲＲ‐１）を得た。
顔料分散体ＰＲ‐１： ２２．５質量部顔料分散体ＰＲ‐２： ２２．５質量部アクリル樹脂溶液（Ｐ‐１）： １．５質量部モノマー（Ｍ‐１）ジペンタエリスリトールヘキサアクリレート： ５．１質量部
（東亞合成社製「アロニックス Ｍ４０２」）
光重合開始剤（チバガイギー社製「イルガキュア‐３７９」 １．０質量部光増感剤（日本化薬社製「ＫＡＹＡＣＵＲＥ ＤＥＴ‐Ｘ」）： ０．２質量部有機溶剤： ４７．２質量部
（プロピレングリコールモノメチルエーテルアセテート）
顔料分散体、光重合開始剤、光増感剤について下記表２に記載のものを用いた以外は、製造例６と同様にして緑色着色組成物ＲＧ‐１、青色着色組成物ＲＢ‐１を得た。なお、表２では、製造例６に係る着色組成物も併せて示した。

<Preparation of coloring composition>
<Production Example 7>
A mixture having the following composition was stirred and mixed to be uniform, and then filtered through a 5 μm filter to obtain a red colored composition (RR-1).
Pigment Dispersion PR-1: 22.5 parts by mass Pigment Dispersion PR-2: 22.5 parts by mass of acrylic resin solution (P-1): 1.5 parts by mass of monomer (M-1) dipentaerythritol hexaacrylate: 5.1 parts by mass (“Aronix M402” manufactured by Toagosei Co., Ltd.)
Photopolymerization initiator ("Irgacure-379" manufactured by Ciba Geigy Co., Ltd. 1.0 parts by mass photosensitizer ("KAYACURE DET-X" manufactured by Nippon Kayaku Co., Ltd.): 0.2 parts by mass Organic solvent: 47.2 parts by mass ( Propylene glycol monomethyl ether acetate)
The green coloring composition RG-1 and the blue coloring composition RB-1 were prepared in the same manner as in Production Example 6 except that the pigment dispersion, photopolymerization initiator, and photosensitizer described in Table 2 below were used. Obtained. In Table 2, the colored composition according to Production Example 6 is also shown.

＜オーバーコート用樹脂組成物の調整＞
＜製造例８＞
＜メラミン樹脂の溶剤置換＞
内容量が５００ミリリットルのフラスコに
アルキル化メラミン樹脂／１‐ブタノール溶液 ３００．０ｇ（日本カーバイド工業製：ニカラックＭＸ‐７５０不揮発分７３．５重量％）入れ、エバポレーターを用いて１‐ブタノールを除去した。このアルキル化メラミン樹脂に、
シクロヘキサノン ７８１．８ｇを加え、不揮発分２２重量％になるように溶剤置換メラミン樹脂（ＭＷ）を調製した。

<Adjustment of overcoat resin composition>
<Production Example 8>
<Solvent substitution of melamine resin>
300.0 g of alkylated melamine resin / 1-butanol solution (manufactured by Nippon Carbide Industries Co., Ltd .: Nikalac MX-750, nonvolatile content 73.5% by weight) was placed in a flask with an internal volume of 500 ml, and 1-butanol was removed using an evaporator. . To this alkylated melamine resin,
781.8 g of cyclohexanone was added, and a solvent-substituted melamine resin (MW) was prepared so as to have a nonvolatile content of 22% by weight.

The composition of the coating liquid and the preparation method are shown below.
Cyclohexanone 50.0 g Diethylene glycol dimethyl ether 52.0 g was placed in a sample bottle.

While stirring
Epoxy resin: ESF-300 6.0 g (manufactured by Nippon Steel Chemical Co., Ltd .: bisphenolfluorene type epoxy resin with an epoxy equivalent of 231 g / eq)
Epoxy resin: EHPE3150 (manufactured by Daicel Chemical Industries) 2.0 g alicyclic solid epoxy resin, 9 epoxy groups in the molecule, epoxy equivalent 170 g / eq) Epoxy resin; EOCN-1020 14.0 g (Nippon Kayaku Co., Ltd.) Orthocresol novolac type epoxy resin, epoxy equivalent 200 g / eq)
Was added and completely dissolved.

Subsequently, 20.0 g of trimellitic anhydride was added as a curing agent and sufficiently stirred and dissolved, and then 0.10 g of dimethylcyclohexylamine was added as a curing accelerator.

  Furthermore, 3.02 g of a silane coupling agent (S-510, manufactured by Chisso Corporation) and 0.12 g of a surfactant (manufactured by Sumitomo 3M: Fluorad FC-430) were added and sufficiently stirred and dissolved. Subsequently, 6 g of silver nanoparticle powder (particle size: 40 nm, manufactured by DOWA Electronics Co., Ltd.) was added. After sufficiently stirring, this was filtered to obtain a resin composition for forming an overcoat layer. The silver particles in the solid content was 11.5%.

The composition of the coating liquid and the preparation method are shown below.
Cyclohexanone 37.0 g Diethylene glycol dimethyl ether 52.0 g was placed in a sample bottle.

While stirring
Epoxy resin: ESF-300 6.0 g (manufactured by Nippon Steel Chemical Co., Ltd .: bisphenolfluorene type epoxy resin with an epoxy equivalent of 231 g / eq)
Epoxy resin; EHPE3150 (manufactured by Daicel Chemical Industries): 2.0 g alicyclic solid epoxy resin, 9 epoxy groups in the molecule, epoxy equivalent 170 g / eq) Epoxy resin; EOCN-1020 14.0 g (Nippon Kayaku) (Orthocresol novolak type epoxy resin, epoxy equivalent 200 g / eq)
Was added and completely dissolved.

Subsequently, 20.0 g of trimellitic anhydride was added as a curing agent and dissolved sufficiently with stirring. Then, 0.10 g of dimethylcyclohexylamine as an accelerator, and 1.2 g of 4-methoxyphenol were added.

  Furthermore, 3.02 g of a silane coupling agent (S-510, manufactured by Chisso Corporation) and 0.12 g of a surfactant (manufactured by Sumitomo 3M: Fluorad FC-430) were added and sufficiently stirred and dissolved.

The composition of the coating liquid and the preparation method are shown below.
Cyclohexanone 40.0 g diethylene glycol dimethyl ether 3.9 g was placed in a sample bottle.

While stirring
Epoxy resin: EHPE3150 (manufactured by Daicel Chemical Industries) 5.0 g Acrylic resin solution (P-2) shown in Production Example 5 40.0 g Monomer: M-1 7.0 g
Was added and completely dissolved.

Subsequently, as a curing accelerator, a photopolymerization initiator: Irg. 397 5.0 g additive; 4-methoxyphenol 0.9 g was added and sufficiently stirred and dissolved.

<Comparative Example 1>
The composition of the coating liquid and the preparation method are shown below.
Cyclohexanone 24.0 g diethylene glycol dimethyl ether 5.1 g was placed in a sample bottle.

While stirring
Epoxy resin: EHPE3150 (manufactured by Daicel Chemical Industries) 1.5 g Melamine resin shown in Production Example 8: MW 1.4 g Acrylic resin solution (P-1) shown in Production Example 4 56.0 g Monomer: M-1 7 0.0 g was added and dissolved completely.

Subsequently, as a curing accelerator, a photopolymerization initiator: Irg. 397 5.0 g was added and sufficiently stirred and dissolved.

<Comparative example 2>
The composition of the coating liquid and the preparation method are shown below.
Cyclohexanone 24.0 g diethylene glycol dimethyl ether 5.9 g was placed in a sample bottle.

While stirring
Acrylic resin solution (P-1) shown in Production Example 4 56.0 g Monomer: 8.8 g of M-1 was added and completely dissolved.

Subsequently, as a curing accelerator, a photopolymerization initiator: Irg. 397 5.3g was added and fully stirred and dissolved.

<Comparative Example 3>
The composition of the coating liquid and the preparation method are shown below.
Cyclohexanone 50.0 g Diethylene glycol dimethyl ether 52.0 g was placed in a sample bottle.

While stirring
Epoxy resin: ESF-300 6.0 g (manufactured by Nippon Steel Chemical Co., Ltd .: bisphenolfluorene type epoxy resin with an epoxy equivalent of 231 g / eq)
Epoxy resin; EHPE3150 (manufactured by Daicel Chemical Industries) 2.0 g
An alicyclic solid epoxy resin having 9 epoxy groups in the molecule and an epoxy equivalent of 170 g / eq) Epoxy resin; EOCN-1020 14.0 g (Orthocresol novolak epoxy resin, Nippon Kayaku Co., Ltd., epoxy equivalent of 200 g / eq)
Was added and completely dissolved.

Subsequently, 20.0 g of trimellitic anhydride was added as a curing agent and sufficiently stirred and dissolved, and then 0.10 g of dimethylcyclohexylamine was added as a curing accelerator.

  Furthermore, 3.02 g of a silane coupling agent (S-510, manufactured by Chisso Corporation) and 0.12 g of a surfactant (manufactured by Sumitomo 3M: Fluorad FC-430) were added and sufficiently stirred and dissolved. Subsequently, 20.0 g of indium-doped tin oxide particles were added. After sufficiently stirring, this was filtered to obtain a resin composition for forming an overcoat layer.

  The resin compositions of Examples 1 to 3 and Comparative Examples 1 to 3 are shown in Table 3.

＜カラーフィルタの作成方法＞
＜製造例９＞
赤色着色組成物ＲＲ‐１、緑色着色組成物ＲＧ‐１、青色着色組成物ＲＢ‐１を用いてカラーフィルタを作製した。まず、赤色着色組成物ＲＲ‐１を、硬化後の膜厚が２．５μmとなるように、スピンコート法によりブラックマトリクスを形成してあるガラス基板に塗布し、乾燥した後、ネガ像を有するフォトマスクを介して超高圧水銀ランプを用いて紫外線で露光した。その後、２３℃の炭酸ナトリウム水溶液を用いてスプレー現像した後、イオン交換水で洗浄し、風乾した。その後、クリーンオーブン中で、２３０℃で３０分のポストベークを行い、赤色着色パターンを有するガラス基板を得た。その後、緑色着色組成物ＲＧ‐１を用いて同様に緑色着色パターンを得る。さらに青色着色組成物ＲＢ‐１を用いて青色着色パターンを得た。

<How to create a color filter>
<Production Example 9>
Color filters were prepared using the red coloring composition RR-1, the green coloring composition RG-1, and the blue coloring composition RB-1. First, the red coloring composition RR-1 is applied to a glass substrate on which a black matrix is formed by spin coating so that the film thickness after curing is 2.5 μm, dried, and then has a negative image. It exposed with the ultraviolet-ray using the ultrahigh pressure mercury lamp through the photomask. Thereafter, spray development was performed using a sodium carbonate aqueous solution at 23 ° C., followed by washing with ion-exchanged water and air drying. Thereafter, post-baking was performed at 230 ° C. for 30 minutes in a clean oven to obtain a glass substrate having a red coloring pattern. Then, a green coloring pattern is similarly obtained using the green coloring composition RG-1. Furthermore, a blue coloring pattern was obtained using the blue coloring composition RB-1.

<Evaluation of resistivity>
A method for measuring resistivity will be described. An electrode of 1 cm ² is made of aluminum on a glass substrate. The transparent coloring composition was applied to the substrate so that the finished thickness was 2 μm. It dried for 2 minutes with a 100 degreeC hotplate, and performed post-baking for 30 minutes in 230 degreeC oven.

Further, an aluminum electrode having a size of 1 cm ² was formed so as to sandwich the transparent coloring composition. Low efficiency was calculated by applying a voltage to the upper and lower electrodes and measuring the current value.

The voltage was measured at 5V. Table 3 shows the measurement results of the resistivity of Examples 1 to 3 and Comparative Examples 1 to 3, which are shown in Table 3. The transparent resin composition was applied at a film thickness of 2.0 μm to obtain a cured film. In Examples 1 to 3 in which the resistivity in the range of 1.0 × 10 ¹⁰ Ω · cm to 1.0 × 10 ¹³ Ω · cm was not observed, no seizure of the liquid crystal display device or poor alignment of the liquid crystal was observed. In Comparative Examples 1 to 3 outside this range, defects such as image sticking and orientation failure were observed.

DESCRIPTION OF SYMBOLS 1 ... Transparent base material 2 ... Black matrix 3 ... Colored pixel 3B ... Blue pixel 3R ... Red pixel 3G ... Green pixel

Claims (6)

A transparent resin composition used for an overcoat layer formed on a colored pixel of a color filter for a liquid crystal display device,
The transparent resin composition comprises at least one kind of metal fine particles, metal wire fine particles,
Or a polymerization inhibitor, an antioxidant, or a quaternary amine salt,
A transparent resin composition having a coating film thickness of 2.0 μm and a resistivity of 1.0 × 10 ¹⁰ Ω · cm to 1.0 × 10 ¹³ Ω · cm when formed into a cured film.   The transparent resin composition according to claim 1, wherein the transparent resin composition is a mixture of an acrylic resin and an epoxy resin, and the acid value of the acrylic resin is 150 to 400. A transparent resin composition used for an overcoat layer formed on a colored pixel of a color filter for a liquid crystal display device,
The transparent resin composition is a mixture of an acrylic resin and an epoxy resin, and the acid value of the acrylic resin is 150 to 400,
A transparent resin composition having a coating film thickness of 2.0 μm and a resistivity of 1.0 × 10 ¹⁰ Ω · cm to 1.0 × 10 ¹³ Ω · cm when formed into a cured film.   The said metal is silver, The transparent resin composition as described in any one of Claims 1-3 characterized by the above-mentioned.   A color filter, wherein the transparent resin composition according to any one of claims 1 to 4 is formed on a colored pixel as an overcoat layer.   A liquid crystal display device comprising the color filter according to claim 5.

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